The increasing global energy and environmental problems are encouraging to the development and utilization of renewable and clean energy in various countries. Wind power is one of the major source in large-scale renewable energy applications. However, the frequency regulation becomes a critical issue while the technology is spreading. Research on the frequency modulation (FM) technology of wind turbines and its control strategy for future power grids become significant. The paper proposes a novel coordinated frequency control strategy with the synchronous generator to solve the unmatched state between the output power of the doubly-fed wind turbines (doubly-fed induction generators) and the grid frequency, combined with the frequency response characteristics of the synchronous generator. The FM coordination strategy is formulated by the modulation coefficient from current wind speed and operation mode of each wind turbine. By coordinating the FM output of the doubly-fed wind turbine and the synchronous generator within the allowable range of frequency deviation, it will achieve the dual goal of reducing the frequency regulation pressure of the synchronous generator and indirectly reducing the abandoned wind volume of the wind turbine. The simulation is carried out on the MATLAB/SIMULINK platform. The results show that the presenting variable coefficient frequency modulation strategy could significant smooth the wind power fluctuation, and allow the reserve power of the doubly-fed wind turbine can fully engaged in frequency modulation which will reduces the frequency modulation pressure of the synchronous generator in the system.

中文翻译：

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基于双馈风力发电机的电网调频优化策略研究

日益严重的全球能源和环境问题正在鼓励各国发展和利用可再生能源和清洁能源。风能是大规模可再生能源应用的主要来源之一。但是，随着技术的发展，频率调节成为一个关键问题。风力发电机的调频（FM）技术及其对未来电网的控制策略的研究意义重大。提出了一种新型的同步发电机协调频率控制策略，以解决双馈风力发电机（双馈感应发电机）的输出功率与电网频率之间的不匹配状态，并结合了同步发电机的频率响应特性。发电机。FM协调策略由来自每个风力涡轮机的当前风速和运行模式的调制系数来制定。通过在允许的频率偏差范围内协调双馈风力发电机和同步发电机的调频输出，可以达到降低同步发电机调频压力，间接减少弃风量的双重目的。涡轮。仿真是在MATLAB / SIMULINK平台上进行的。结果表明，提出的变系数调频策略可以显着缓解风电波动，使双馈风力发电机的备用功率充分参与调频，从而降低了同步发电机的调压压力。系统。